Paypal iphone integration error

Question

[PayPal initializeWithAppID:@"APP-80W284485P519543T" forEnvironment:ENV_SANDBOX]; 

UIButton *button = [[PayPal getInstance] getPayButtonWithTarget:self andAction:@selector(payWithPayPal) andButtonType:BUTTON_278x43];

Any one of line, If I am writting in my application's viewDidLoad or appDidFinishLauch, then it works fine on simulator, but while I do run it on iOS5 (iPod Touch) it gives the following error, and goes hang or crash...

Program received signal:  “EXC_BAD_ACCESS”.
warning: check_safe_call: could not restore current frame
Data Formatters temporarily unavailable, will re-try after a 'continue'. (Can't find dlopen function, so it is not possible to load shared libraries.)

What is meaning of this issue, and how to solve it?

NOTE: The issue is only in iOS5, in all other devices and simulators, its working fine, I am using Mac OS 10.6 and SDK is 4.

Can anyone has issue like this, or know how to solve it?